<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>getHoursDiffBetweenDates</title>
</head>

<body>
    <div>打开浏览器控制台查看结果</div>
    <script>
        const getHoursDiffBetweenDates = (dateInitial, dateFinal) =>
            (dateFinal - dateInitial) / (1000 * 3600);
        console.log(getHoursDiffBetweenDates(
            new Date('2021-04-24 10:25:00'),
            new Date('2021-04-25 10:25:00')
        ));
    </script>
</body>

</html>